mouse – the Ubuntu 18 touchpad does not work properly

My touchpad does not work properly under Ubuntu 18. I can left-click on buttons, etc., but the cursor does not move.

That's the result of my xinput:

⎡ Virtual kernel pointer identifier = 2    [master pointer  (3)]
⎜ ↳ Identifier of the XTEST pointer of the virtual kernel = 4    [slave  pointer  (2)]
NA ↳ SYNA7DB5: 00 06CB: Touchpad ID 7DB7 = 12   [slave  pointer  (2)]
⎜ ↳ Logitech USB Receiver ID = 15   [slave  pointer  (2)]
⎜ ↳ Logitech USB Receiver ID = 17   [slave  pointer  (2)]
⎣ Virtual keyboard identifier = 3    [master keyboard (2)]
    ↳ XTEST keypad identifier of the virtual kernel = 5    [slave  keyboard (3)]
    Id Food Button id = 6    [slave  keyboard (3)]
    ↳ Video bus ID = 7    [slave  keyboard (3)]
    ↳ Video bus ID = 8    [slave  keyboard (3)]
    Id Power button id = 9    [slave  keyboard (3)]
    ↳ Standby button id = 10   [slave  keyboard (3)]
    ↳ HD WebCam: HD WebCam ID = 11   [slave  keyboard (3)]
    ↳ AT Translated Set 2 Keyboard ID = 13   [slave  keyboard (3)]
    ↳ Acer WMI keyboard shortcuts id = 14   [slave  keyboard (3)]
    ↳ Logitech USB Receiver ID = 16   [slave  keyboard (3)]